AI agents call search_by_type to retrieve information from Robust Long-Term Memory MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool appears to query or filter memories by type from a persistent memory system. It retrieves data without side effects. The absence of a description lowers confidence slightly, but the naming pattern and context of sibling search tools indicate read-only functionality. No evidence of data modification, deletion, or execution of arbitrary code.
From the tool's definition Tool name 'search_by_type' indicates a search/query operation. No description provided, but sibling tools (search_memories, search_by_date_range, search_by_tags) are all read-only queries.
Documented attack patterns abuse exactly the kind of access search_by_type gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Robust Long-Term Memory MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for search_by_type:
{
"version": "1",
"default": "deny",
"tools": {
"search_by_type": {}
}
}search_by_type is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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search_by_type. It is categorised as a Read tool in the Robust Long-Term Memory MCP MCP Server, which means it retrieves data without modifying state.
Register the Robust Long-Term Memory MCP server in PolicyLayer and add a rule for search_by_type: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Robust Long-Term Memory MCP. Nothing to install.
search_by_type is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the search_by_type rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for search_by_type. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
search_by_type is provided by the Robust Long-Term Memory MCP server (rotoslider/long-term-memory-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 11 Robust Long-Term Memory MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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11 Robust Long-Term Memory MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.